释义 |
de Moivre's Identity
 | (1) |
From the Euler Formula it follows that
 | (2) |
A similar identity holds for the Hyperbolic Functions,
 | (3) |
References
Arfken, G. Mathematical Methods for Physicists, 3rd ed. Orlando, FL: Academic Press, pp. 356-357, 1985.Courant, R. and Robbins, H. What is Mathematics?: An Elementary Approach to Ideas and Methods, 2nd ed. Oxford, England: Oxford University Press, pp. 96-100, 1996. |